The segfault was occurring in Rf_asCharacterFactor, which was using
the levels attribute without sanity checks. Sanity checks are now
added (r68119 in trunk and r68120. in R-3-2-branch), which now gives
data(housing, package ="MASS")
x <- housing$Type + housing$Sat
Warning message:
Incompatible
I left out the warning - it's still there. The output object is
malformed but either +.factor should prevent this or match() should
check.
Hadley
On Mon, Mar 30, 2015 at 3:50 PM, William Dunlap wrote:
> Did you leave out the warning from "+", which should be an error,
> as it produces an illegal
For consistency with factor+factor and factor+numeric, factor+ordered
should produce a logical vector filled with NAs, not throw an error.
Bill Dunlap
TIBCO Software
wdunlap tibco.com
On Mon, Mar 30, 2015 at 1:50 PM, William Dunlap wrote:
> Did you leave out the warning from "+", which should b
Did you leave out the warning from "+", which should be an error,
as it produces an illegal ordered factor in this case and factor+factor
is nonsensical? Or is the warning missing in the current development
version of R?
> x <- factor("A", ordered=FALSE) + factor(c("B","C"), ordered=TRUE)
Warning
